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基于MODIS和VIIRS遥感图像的苏禄-苏拉威西海内孤立波特征研究*
张涛1, 张旭东①2
1.山东科技大学测绘科学与工程学院 青岛;2.中国科学院海洋研究所海洋环流与波动重点实验室 青岛
摘要:
苏禄海和苏拉威西海是内孤立波频发海域,本文基于2016年10月至2019年9月的中分辨率成像光谱仪(MODIS)和可见光红外成像辐射计(VIIRS)光学遥感数据开展了苏禄海和苏拉威西海的内孤立波特征分析研究。空间分布特征表明,苏禄群岛的西北部海域(118°E~121°E,6°N~10°N)和苏拉威西海南部海域为内孤立波多发区域。苏拉威西海南部海域存在南向和西向交叉传播的内孤立波。苏禄海和苏拉威西海的内孤立波波峰线最长可达400 ~500 km,主要集中在100~150 km范围内。利用射线追踪法结合遥感图像分析表明,Sibutu岛和Simunur岛附近海域存在4个发生源,生成的内孤立波分别向苏禄海的西北方向和苏拉威海的东南方向传播。遥感观测表明苏拉威西海也存在自东向西传播的内孤立波,共有3个发生源,位于Bangka岛与Biaro岛附近海域。苏禄海的内孤立波主要向西北方向传播,其传播速度在2.0 m/s左右。苏拉威西海自东向西传播的内孤立波的速度在3.1 m/s左右,自北向南传播的内孤立波的速度为3.0 m/s左右。
关键词:  内孤立波  苏禄海  苏拉威西海  MODIS  VIIRS  
DOI:10.11693/hyhz20200100027
分类号:
基金项目:中国科学院先导科技专项,国家青年自然科学基金,中国博士后科学基金
Analysis of internal solitary wave characteristics in the Sulu-Celebes Sea based on MODIS and VIIRS remote sensing images
ZHANG Tao1, ZHANG Xu-Dong2
1.College of Geomatics,Shandong University of Science and Technology;2.Institute of Oceanology,Chinese Academy of Sciences
Abstract:
Internal solitary waves (ISWs) are frequently observed in the Sulu Sea and the Celebes Sea. Based on MODIS and VIIRS optical remote sensing images from October 2016 to September 2019, the characteristics of ISWs in the Sulu Sea and the Celebes Sea are studied. The spatial distribution characteristics show that the northwest area of the Sulu islands (118°E~121°E, 6°N~10°N) is the sea area where ISWs occur most frequently in the Sulu Sea. Multiple ISW packets and cross-propagation ISWs are observed in the southern Celebes Sea. The maximum length of ISWs crest in the Sulu Sea and the Celebes Sea reach 400-500 km, mainly located between 100 km and 150 km. The ray-tracing method combined with remote sensing image observations shows that there are four primary generation sources in the Sulu Sea and three in the Celebes Sea of east. ISWs generated in the area around Sibutu and Simunur islands travel to the northwest of the Sulu Sea and the southeast of the Celebes Sea, respectively. Remote sensing observations also find westward propagation ISWs in the Celebes Sea, which are generated in the areas around Bangka island and Biaro island. The ISWs in the Sulu Sea mainly travel to the northwest, with a velocity of 2.0 m/s. The velocity of ISWs propagating from the east to the west in the Celebes Sea is about 3.1 m/s, while for ISWs propagating from the north to the south is about 3.0 m/s.
Key words:  Internal solitary wave  Sulu Sea  Celebes Sea  MODIS  VIIRS
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